Russia’s deputy foreign minister denied Moscow had formed an alliance with Iran in Syria and said the Kremlin was deeply committed to Israel’s security in an interview with CNN, Friday.

“We in no way underestimate the importance of measures that would ensure very strong security of the state of Israel. The Israelis know this, the U.S. knows this, everyone else, including the Iranians, the Turks, the government in Damascus. This is one of the top priorities of Russia,” Sergei Ryabkov told CNN.

Asked whether Russia and Iran were allies “on the ground” in Syria, Ryabkov said, “I wouldn’t use this type of word to describe where we are with Iran. We are working together with them … but we do not see at any given moment completely eye to eye on what happens.”

He noted that Moscow “acted last year to persuade Tehran to kind of withdraw from the border with Israel with some heavy equipment so that this area would be more protected and there would be no attempts on the part of highly controlled militias to attack Israel from that front.”

According to Ryabkov, Russia had been prepared “to go even further” at the time, “although it’s always very difficult to negotiate with the Iranians. But it didn’t work because of [the] U.S. and Europeans’ inability to guarantee even as, you know, some extension of reimposition of U.S. extraterritorial sanctions on Iran.”

Meanwhile, Foreign Policy magazine reported that the Pentagon was weighing a plan that would see the U.S. maintain a military presence in a base in southeastern Syria in an attempt to thwart the establishment of a direct supply route from Iran to Syria through Iraq.